feat: improve styles

Improve styles by replacing the inner div by a span, add class for errorLabel span and add default styles for fixing appearence
Closes #35

Author: mlopezFC

src/main/java/com/flowingcode/vaadin/addons/errorwindow/ErrorWindow.java

@@ -307,11 +307,11 @@ protected Html createErrorLabel() {
       label =
           label.concat(
               String.format(
-                  "<br />%s<div class='uuid'>%s</div>",
+                  "<br />%s<br /><span class='uuid'>%s</span>",
                   i18n.getInstructions(), uuid));
     }
     final Html errorLabel = new Html("<span>" + label + "</span>");
-    errorLabel.getElement().getStyle().set("width", "100%");
+    errorLabel.getElement().getClassList().add("errorlabel");
     return errorLabel;
   }
 }

src/main/resources/META-INF/resources/frontend/flowingcode/error-window.css

@@ -28,6 +28,14 @@
   font-weight: 600;
   font-size: var(--lumo-font-size-l);
   margin-top: 1em;	
+  display: inline-block;
+  margin-left: auto;
+  width: 100%;
+}
+
+[theme~="error-window"] .errorlabel {
+  width: 100%;
+  word-break: break-all;
 }
 
 [theme~="error-window"] .stacktrace {